粉煤灰烧结陶粒制备与其强化废水中磷酸盐去除的试验-.研究

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1、硕士学位论文AbstractCoalflYash，thesolidwaste0facoal—firedpowerplant，cannotonlypollutethegroundwatersystem，butalSOcangenerateatmosphericpollutioncausedbyDust．Thesinteredceramsitesmadefromcoalflyash，smallamountofclayandotheradmixturesweretestedandusedinwastewaternutrientpollutioncontrol(phosph

2、ateremoval)，whichisanewwayOfflyashresourcization．Asforflyash，thecurrentresearchmainlyfocusesonthepreparationandremovalOfheavymetalionsandoilfromwastewater，andtheflyashceramsiteisrarelyusedforenhancedremoval0fphosphatefromwastewaterinecologicalpollutioncontrolengineeringandBiologicalAer

3、atedFilter．Thenewsinteredceramsitesweremadefromcoalflyashadoptingsinteringmethod，thebestrecipeandsinteringconditionsofflyashceramsitewereselectedthroughthedesignofsinglefactorexperimentandtheorthogonalexperiment，withspecifiCsurfaceareaandbulkdensityasthemeasureindexsimultaneously．X—ray

4、diffraction(XRD)andscanningelectronicmicroscope(SEM)wereappliedtomeasuretheflyashceramsitecomparedwithnormalceramsites．Besides，theceramsiteiSusedforremovalOfphosphateonsimulatetheeffluentofasecondarytreatmentprocess0fawastewatertreatmentplant，discussingtheinfluenceofinitialconcentratio

5、nofphosphate，usageofceramsite，reactiontemperatureandpHontheremovaleffects．Inaddition，thedesorptionexperimentofadsorptionsaturationceramsitewascarriedon，discussingsynchronouslytheinfluenceOfdesorbent．concentration0fdesorbentandpHonthedesorptioneffects．Theresultsshowthatspecificsurfacear

6、eawashighunderthebestmaterialrateOfflyashat509，bentoniteat359，quicklimeat129，sodiumsilicateat59，andtheoptimalsinteringconditionofsinteringtemperatureat150℃，sinteringtimeat45min，preheatedtemperatureat400℃，preheatingtimeat25min．Resultsalsoprovedthattheremainingconcentrationofphosphatewas

7、lessthan0．5mg／LunderthepH4～10，andthedosageof29／L．Thephosphateadsorptionisarelativelyslowprocess，粉煤灰烧结陶粒的制各及其强化废水中磷酸盐去除的试验研究andreachesequilibriumstatusin12hours，andthepseudo—second—orderkineticequationissuitableforthestimulationoftheprocess．Themaximumadsorptioncapacityofphosphatedecre